| and also, the real reliability by counting the square root of the previous values of reliability were as follows: 0,921; 0,889; 0,885 | "Dimensions of dysfunctional attitudes as vulnerabilities to depressive symptoms" |
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| The Scale has achieved appropriate and high indicators of reliability, through the Split-half using the equations of: Spearman - Brown, Guttmann, and their values are respectively: 0,792; 0,784 and also the internal consistency of the paragraphs using the alpha coefficient Cronbach Alpha value of 0,849 | Brown GP, Hammen CL, Craske MG, Wickens TD August 1995 |
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| Beck AT, Ward CH, Mendelson M, Mock J, Erbaugh J June 1961 | 885 The current research aims at investigation the psychometric properties validity and reliability according to Beck Scale for depression among secondary school students, in particular the third year, in M'sila |
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| Hersen M, Turner SM, Beidel DC 2007 | "A review of current assessment tools for monitoring changes in depression" |
"Use of the Beck Depression Inventory for Primary Care to screen for major depression disorders".